In Sun Zhenglu's decades of research, according to Tian Yusheng's story, Fu Xin judged that he had a lot of experience in the feeder automation system based on the mutual cooperation of automatic switchgear, but even so, Fu Xin was very happy.

If, if Huaxing can invite him over, before Toshiba in Japan and Cooper in the United States, the recloser and voltage time sectionalizer cooperation mode of Toshiba company in Japan and the recloser and recloser cooperation mode of Cooper company in the United States as the representative of the feeder automation system based on the interaction of automatic switchgear this important technology and register, then Huaxing can make a lot of money!

"Master, please ask, how to get to this address?" Fu Xin entered an urban village, and after turning around a few times, he really couldn't figure out the direction, so in desperation, Fu Xin had to stop the car at the intersection, take the note handed over by Tian Yusheng, and ask the residents passing by outside the window for directions.

The four people in the car have not been to this place called "Pingliang Road", Tian Yusheng vaguely knows that the Puyang District Government is near a Pingliang Road, but Pingliang Road is relatively long, this piece is really a bit big, and the big one is dizzying.

"Pingliang Andri, oh, I know, that place is really not easy to find, and it is not on Pingliang Road, that place is almost yellow. It's on the edge of the Pujiang River, and it's very inside, and it's normal for Nong to find it...... Nong and a few people went all the way to the south, and then ran east when they saw a water tower, about two miles ahead, there were two chimneys, and Nong went under the second chimney. There is an alley, and then ...... south of the alley," the old man of the sea city who was still very enthusiastic even said with a gesture. Before he could finish speaking, the four people in the car had already fainted.

Walked past countless water towers and chimneys. Fu Xin and the four finally found the community on the address, which is a community composed of more than a dozen six-story unit buildings built in the 50s, and the community is planted with tall poplar trees, which shade the sky and look very shady in the midsummer afternoon.

"Comrade, who are you looking for?"

At the entrance of the community, an old lady with gray hair came up vigilantly and stopped the jeep. Looking at the four big men sitting in the car, she asked vigilantly, her old man was wearing a red armband on his arm, looking like a Red Guard.

"No. 13, Nine Gates, 202, Sun Zhenglu." Tian Yusheng took the note and read it to the old lady according to the content on it, and after reading it, he also handed the note to the old lady and let the old lady check it. At the same time, he asked, "Auntie, please ask, does this old gentleman still live here?" ”

The old lady devotedly took out a pair of reading glasses from a pair of pockets and put them on the bridge of her nose. With the sun's rays, Mrs. God could read the words on it clearly, so she asked vigilantly, "What is the relationship between Nong and him?" What are Nong going to do with him? ”

Tian Yusheng honestly confessed: "Auntie, I am his student. I came to see him! ”

"Students? Where are the students? ”

"Uh......" Tian Yusheng saw that the old lady's vigilance was even more, and his face turned embarrassed. This Sun Zhenglu is just a visiting professor, and he has very little time to be a teacher, maybe this aunt doesn't know that Sun Zhenglu has also been a teacher, so she is so vigilant! But the explanation has to go on!

Tian Yusheng continued to explain: "Auntie, I am a student of his former Offshore Electric Power College, oh, formerly called Offshore Electric Power College, and Sun Lao is my mentor. By the way, this is my work card, I am an electrician of Huaxing Machine Tool Factory under Huaxing Industrial Development Company in Xijiang Province. ”

The old lady took the work card handed over by Tian Yusheng, looked at it very carefully, and said, "Yes, young man, he is still a director-level electrician, so let's go in!" Whoever is that, it's the driver! Nong parked Nong's car under the shade of a tree in front of him. Her last sentence was said to Fu Xin, who was sitting in the driver's seat.

As an electrician, Tian Yusheng really can't do the position of director, and the position of director is just installed for him by Fu Xin not long ago, after all, he is now the leader of the liaison group of Huaxing's participation in the West-to-East Power Transmission Project.

"That's not the driver, he's ......," Tian Yusheng was about to explain.

"Hehe, I'm the driver." Fu Xin grinned. Judging from their ages, it is most reasonable to say that Fu Xin is Tian Yusheng's driver. After all, Tian Yusheng is seven or eight years older than Fu Xin, if Fu Xin is Tian Yusheng's superior, it is estimated that the old lady will immediately call the police, thinking that these four young people must be idle people in society, and they are not good people. The simplest proof is: in this world, how can there be a reason for a boss to drive for his employees?

"Auntie, is Old Sun at home at this time?" Tian Yusheng asked with concern, as for whether Sun Zhenglu is still alive, there is no need to ask, from the old lady's reaction, it can be seen that Sun Zhenglu must still be alive, there is no need to add to the troubles and be misunderstood and cursed Sun Zhenglu is dead.

"A few of them went to his house to look for him, and every day at this time, he was downstairs teaching a group of students. Nong saw that there was no one, and he was the one who was teaching the students there. The old lady pointed to a shade of trees in the community.

"Class? What classes are taken? Fu Xin and the four of them were puzzled, according to Tian Yusheng's story, Sun Zhenglu had already retired at this time, how could he still teach students, this is unlikely! And very importantly, Tian Yusheng mentioned before why she didn't come to Sun Zhenglu's house, because when Sun Zhenglu was in class at the Offshore Electric Power College, he lived in the faculty dormitory.

Fu Xin thanked the old lady with a belly full of suspicion, parked the car, picked up the gifts on it, and walked in the shaded direction guided by the old lady.

When I got closer, I saw six or seven half-grown children sitting in the shade of a tree, listening attentively to the lecture. On the tree in front of them hung a blackboard that appeared to have been painted with black paint on the bed board, on which was written in hydrated lime: "Lenz's law: the induced current has a direction such that the magnetic field that induces the current always hinders the change in the magnetic flux that causes the induced current." ”

In front of the blackboard, an old man with thin-haired gray hair was standing explaining to the children who looked like high school students: "The formulation of Lenz's law boils down to this: 'The effect of induced electric current always resists the cause of it.'" ’

If the induced current on the loop is caused by a change in the magnetic flux passing through the loop. Then Lenz's law can be specifically expressed as: 'The magnetic flux generated by the induced current in the loop always resists (or hinders) the change of the original magnetic flux. ’

We call this expression the flux formulation, where the effect of the induced current is that a magnetic flux is generated in the loop; The cause of the induced current is the change in the original magnetic flux.

It can be used in twelve words to vividly memorize the same as 'increase and subtraction'. To block, to stay, to increase, shrink and expand. ’

If the induced current is generated by the movement of the conductors that make up the loop to cut the magnetic inductance lines. Then Lenz's law can be specifically formulated as: 'The magnetic field force (ampere force) of the induced current on a moving conductor always resists (or hinders) the motion of the conductor. ’

We might as well call this expression the force formulation, where the effect of the induced current is the force of a magnetic field; The reason for the induced current is the movement of the conductor to cut the magnetic inductance line.

From the above statement of Lenz's law, it can be seen that Lenz's law does not directly indicate the direction of the induced current, but only summarizes the principle of determining the direction of the induced current, and gives the procedure for determining the induced current......"

Fu Xin and the four of them stopped, not daring to step forward to disturb the attentive teacher and a few attentive students, but stood behind the big tree, Fu Xin was afraid of disturbing these people, so he lowered his voice and asked Tian Yusheng: "Is this your teacher, Mr. Sun Zhenglu?" ”

Tian Yusheng nodded. replied: "This is my teacher, Mr. Sun Zhenglu, but the teacher looks much older than when I was studying with him seven or eight years ago......

Fu Xin looked at Sun Zhenglu and saw that he was about 1.7 meters tall, and his body was very thin, like a bamboo pole. His hair is thinning and graying, and his eyes seem to have some cataracts, and he can't see much brilliance. Fu Xin's eyes are good. He also saw that the green veins on Sun Zhenglu's head were exposed.

Since there were seven or eight students around, and they were teaching outside, there was no wall to block it, and the sound wave spread very quickly. So he tried his best to raise his voice, but after all, he was not in the middle of the breath, and often after saying a few words. The voice weakened and I had to stop to catch my breath. Take a sip of water once in a while before moving on.

"Sun Lao is really an old man. It's amazing to give students make-up lessons at such an old age! Fu Xin said admiringly.

Tian Yusheng nodded and replied: "Teacher, he has always liked the profession of teacher, otherwise he would not have come to our school as a visiting professor, after all, his real profession is a researcher at the Institute of Electrical Engineering, because he likes the profession of a teacher, he likes to teach and solve doubts, so he came to our school." However, compared to back then, his voice now is far less loud than it was at the beginning! ”

"I'll tell you about Lenz's law, too." Fu Xin asked hehehe, the smile on his face proving that he did it on purpose.

Tian Yusheng's face turned red, "Mr. Fu, don't say it, this is really there, although Lenz's law is now the content of high school, but at that time, where did I learn too much scientific and cultural knowledge in high school, it was all by that commission. It was written by the staff and the content was simple, and we didn't learn Lenz's law at all when we were in high school. ”

This Fu Xin is not good at deliberately laughing, he understands what is going on with the textbooks of that special period, the textbooks at that time are very different from other times, all of them are made by that commission. The committee will be uniformly established.

In the textbooks of that time, almost all of the books had "supreme instructions" on the covers. Whether it is mathematics, physics and chemistry, or literature, history and geography, it is full of large paragraphs of quotations and critical clichés, and there are very few real knowledge points.

Due to the lack of knowledge points in the textbook, the textbook is not as gradual as at other times, but very brief. How simple is it?

To put it simply, the content of the physics book is condensed into "three machines and one pump", that is, tractors, diesel engines, electric motors, and water pumps! Creatures are grouped down as "three crops and a pig"! Such textbooks are used to teach, where to learn what Lenz's law.

PS: I found out that the title of the sixth chapter was repeated.,But the content isn't.,Now skip over.。 So chapter 12 was not omitted. (To be continued......)